In this lesson learners will be introduced to the concept of iteration. Specifically in this lesson, the examples will be focused on count-controlled iteration. The learners will be given an inelegant program and be asked to spot patterns and repetition. They will be taken through a live coding demonstration to take their inefficient program and add iteration to make it more efficient. Learners will then use pair programming to create a Scratch version of the nursery rhyme Ten Green Bottles, using count-controlled iteration. Finally, learners will be introduced to the concept of debugging and they will be given a program to debug by tracing the value of the variables.